Study On Logging Evaluated Reservior Of The Layer Of Upper Paleozoic In The DX Area Of Dniudi Gas Filed

The structure of Daniudi gas field is located in the north-east of Yishan slope of the Ordos basin, which part of structure is not growth. The target layers have grown in this background. The target layers are characterized by low porosity and low permeability reservoir, which heterogeneity is very serious. So it is difficult to identify available reservoir. The limit of the amplitude of structure, lithology and physical property results in the bad differentiation degree and the obscure logging responsed to the character of gas and water.In order to solve the above problems, this paper makes full use of various kinds of collected logging data to study the relationship between complicated lithology and logging responsed. Then using TFI identifies the complicated litholoy of reservoirs. This paper uses various kinds of collected logging data, combining geological, logging, test and other informations, to establish rock physical model and reservoir parameter evaluation model for the target layers of DX area of Daniudi gas filed.The complex gap structure of the DX area in the Daniudi gas filed causes the distribution of various fluids in formation and mud or mud filtrate invaded features diversity. It not only affects reservoir fluid properties, also affect the logging curves response. In the complex pore space structure of target reservoir distinguished fluid properties should make full use of test analysis results, analyze the logging response characteristics of gas water and influencing factors to pick out the right method discriminated different reservoir liquid from different angles of reservoir property and different reflects of gas, water and dry layer. Especially taking the advantage of NMR logging technology calculates bound water volume, moving fluid volume and identifies fluid.According to the main evaluation parameters, such as porosity, moving hydrocarbon porosity, containing gas saturation and effective thickness, which influent reservoir productivity and calculated by well logging, establish the experience formula to calculate the ability of production for the each layer.Through this paper research, it will improve the ability of logging interpretation assessment technical.